SYT-SSX1 or -SSX2 fusion protein (402-410 (SYT))

SYT-SSX1 or -SSX2 fusion protein (402-410 (SYT)) is a recombinant peptide fragment representing a critical region of the synovial sarcoma translocation (SYT) protein, specifically the amino acid sequence 402-410, as found in the oncogenic SYT-SSX1 and SYT-SSX2 fusion proteins. These fusion proteins arise from chromosomal translocations characteristic of synovial sarcoma, a rare but aggressive soft tissue tumor. The 402-410 region of SYT is implicated in mediating protein-protein interactions and may play a role in the altered transcriptional regulation conferred by the fusion event. As a synthetic peptide corresponding to this functionally relevant segment, it offers a unique molecular tool for dissecting the biochemical and cellular consequences of the SYT-SSX fusion in various experimental settings.

Epitope mapping: The 402-410 region of the SYT-SSX fusion protein is frequently utilized for epitope mapping studies aimed at characterizing antibody specificity and binding profiles. Researchers employ this peptide fragment to identify and validate monoclonal and polyclonal antibodies that selectively recognize the fusion junction or adjacent epitopes. Such mapping is essential for developing reliable immunoassays and for advancing the understanding of immune recognition in synovial sarcoma research.

Protein interaction studies: The synthetic SYT-SSX1/SSX2 (402-410) peptide serves as a valuable probe for investigating protein-protein interactions mediated by the SYT domain. By incorporating this fragment into pull-down assays, affinity purification, or surface plasmon resonance experiments, scientists can elucidate binding partners and interaction motifs that are altered by the fusion event. These studies provide insight into the molecular mechanisms underpinning aberrant transcriptional regulation and oncogenic signaling pathways in sarcoma cells.

Peptide-based assay development: The defined sequence of the 402-410 SYT region enables its use in the development of peptide-based detection assays, such as ELISA or mass spectrometry-based quantification methods. Incorporating this peptide as a standard or capture reagent allows for the sensitive and specific detection of SYT-SSX fusion proteins in cell lysates or tissue extracts. Such assays are instrumental in supporting basic research, biomarker discovery, and preclinical model characterization.

T-cell epitope characterization: The SYT-SSX1/SSX2 (402-410) peptide is also relevant for studies focused on T-cell epitope identification and immunogenicity assessment. Researchers can use this fragment to evaluate MHC binding affinity, T-cell receptor recognition, and antigen presentation in vitro. These investigations contribute to a deeper understanding of the immune landscape in synovial sarcoma and may inform the design of experimental immunological tools or research vaccines.

Structural and functional analysis: Incorporating the 402-410 SYT peptide into structural biology experiments, such as NMR spectroscopy or crystallography, facilitates the examination of conformational features and dynamic properties specific to the fusion region. Such analyses help clarify how the SYT-SSX fusion alters the local and global structure of the protein, thereby influencing its functional interactions and regulatory activities within the cell. This structural insight is crucial for unraveling the molecular basis of synovial sarcoma pathogenesis and for guiding the rational design of research inhibitors or modulators.

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